Bending press



Oct. 189 D. vKONDAKJIAN BENDING PRESS Filed Deo. 1o. 1926 s sheets-sheet 1 ATTORNEYS.

Oct. 1s, 1927.

D. KONDAKJIAN BENDING PRESS Fild Deo. lO. 1926 3 Sheets-Sheet 2 IN V EN TOR.

/5 Dan z Z on/aZ alud) A TTORNEYS.

oct. 18,1927. u 1,645,865 A ILNDAKJIAN l BENDNG PRESS Filed Dec. lO 1926 v 3 Sheets-Sheet 3 15 fr 43 l, INVENTOR.

Patented Oct. 18, 1927.

UNITED STATES PATENT OFFICE.

DANIEL KONDAKJIAN, OF NEWARK, NEW JERSEY.

BENDING PRESS.

Application led December 10, 1926. Serial No. 153,749;

ports for the filaments, grids and plates of vacuum tubes or thermionic amplifiers'may ie automatically and simultaneously shaped, in the process of manufacturing such devices, by substantially one operation, whereby rapid and accurate production may be assured, and necessity for costly hand work or separate cutting and bending operations may be eliminated. 'Y

To the above ends, this invention provides a novel cutting and bending press provided with cutting and bending dies or elements, certain of which are actuated by afvertically reciprocable plunger', vand othersof which are actuated by a horizontally reciprocable plunger, in combination with which isv a iovel arrangement and construction of compound Aplunger-actuating lever means by.

means of which properly timed cooperative movements ofthe respective plungers is prov duc'edby each single oscillation of a power transmission mea-11s. 4

The invention has for a further object to provide a novel detail arrangement and construction of cutting and bending die, elements, whereby each lead and-support wire connected with the tube base is wrought to desired finished form.

Other objects of this invention, not at this time more particularly enumerated, will be clearly understood from the following detailed description of the saine.

lith the various objects of this invention in view, the same consists. primarily'.in the novel automatic cutting and bending press hereinafter set forth; and, the invention consists, furthermore'. in the novel arrangements and combinations of the various devices and parts, as vwell as in the details of the construction thereof, all of whiclrwill be hereinafter more 'fullyl described in the following specilication, and then, finally em# bodied in ,the claims appended thereto.

The invention is clearly illustrated in the accompanyingv drawings, in which Figure 1 is a plan view of the novel cut#` 'machine ting and bending press made according to and embodying the principles of this in-l vention; Figure 2 is a front elevation of the same; Figure 3 is a longitudinal vertical section with the. parts in normal initial position; Figure 4 is a similar longitudinal vertical section, showing the actuation of the vertical plunger to produce the first stage or phase of the cutting and bending opera-V tions; and Figure 5 is another longitudinal vertical section, showing the actuation of the horizontal plunger to produce the iinal stage or phase of the bending operations.

Figure 6 is a fragmentary horizontal section, taken on line 6 6 in Figure 3; Figure 7 is a similiar view, taken on line 7 7 in Figure 41; and Figure 8 is also a similar view, taken on line 8-8 in Figure 5;

Figure 9 is a fragmentary horizontal section through a portion of the vertically reciprocable plunger, to show lthe cutting elements thereof; and Figure 10 is a `fragmentary perspective showing the vstationary anvil or cutting' and bending block of the Figure 11 is a fragmentary part plan andk part section of the bending elements of the horizontally 'reciprocable plunger.-

Figure 12 is a collective perspective view, showing the stages or phases of the cutting or'bending of the leads and supports of the tube base; and Figure 13 is aperspective view of a finished tiibe base. Y Similar characters of reference are employed in all of the hereinabove described views, to indicate corresponding parts.

Referring now to said drawings, the Yreference character 15 indicates a base plate upon which the mechanism of the novel 'cutting and bending press is mounted. Suit-ably fixed upon said base plate is a bed-block 16, which is cut away in its forward portion to provide a well 17 extending downwardly therethrough. That portion of the bed-block 16 vwhich extends forwardly from the-well 17 constitutes an anvil portion 18 for supporting the wires forming the leads and supports of the tube base.V Extending from the well 17 longitudinally and centrally into said anvil portion 18 is a femalev bending member19, the inner end of which provides a bending step 20, against which the central filament support wire A may be bent into desired shape. That end of the anvil por-L tion 18 bounding the-outer end of said well 17 is shaped to provide a pair of stationary shearing or cutting portions 21 against `which the Aiilanient lead-supports l?) may be cut or trimmed to desired prede'u-n'n'iinedlength.` and is further shaped toprovide another y tionary bending posts 23, against which said filament lead-supports B may be bent into desired shape; and also fixed on said anvil portion 18 in proper locations are a second pair ot stationary bending posts 24, against which saidgrid supports C may be bent Ainto desired shape. Secured to the outer end ot said bed-block 16, to extend transversely, is

v a `plate 25 having Van indented notch in lits upper marginal portion, .the sides 26 of which project above the level of said anvil portion 18, `and provide bending steps against which the plate supports D of the tube bases may be bent. Said anvil portion 18 is provided along each side thereof, and in cooperative relation to said bending steps 26 with guide-blocks 27 'suitably shaped to provide femalev bending die-portions 28 with which certain subsequently described male bending die elements of the horizontally reciprocable plunger cooperate in completing the shapes to which said'plate supports D are to contorni. The side Walls of said/Well 17 are provided, flush with the surface of said -anvil portion 18,'vrith inwardly projecting lugs 29, which serve to preliminarily.- hold the said plate supports D against accidental depression into said Well 17. i

Secured to'said 'bed-block 1G, `with its lover end straddling saidbed-blocl, isV an upstanding transversely disposed guide-plate 30 provided with a vertical slideivay 31, in which is slidably mounted a vertically reoiprocable plunger 32. `Mounted `on the lower end oiE said plunger 32 is a shear block having at its forward tace cutting edges 34 and 35, which respectively'coopeisite with said cutting portions 21 and 22o!l the anvil Y portion 18,'in shearing relation thereto upon descent ot saidplunger 32, all whereby said filament lead-support wires B and grid support ivires C of a tube. base Vare cut or trimmed to foreshorten the saine to the desired length preliminary to bending the saine into linal desired shape.

Fixedlysecured to the lower end of said shear block 33, to extend through the' saine from rear tov front, and so as to proj ect below its bottoni end. is a vertical male bending member 36, 1which is adapted to nieve doi'vin vvardlyV into Vsaid female bending member 19 of the anvil portion 18, so that free outer end cooperates with said bendingstep 20,`

whereby, upon descent of the plunger 32, the 'centralfilaxnent su port `Wire A of a tube base is bent downwar ly into the desired offset tor-1n, as shown. Y

Alsosecured to said plunger 32,'so as to and at each side ot said shear block Wit-h spreader `firigers" 38 having downwardly and inwardly inclined lateral edges or spreader cam portions 39. Said spreader fingers38 are sospac'ed laterally, that, upondescent of the plunger 32, the saine will engage with their spreader cam portions 39 the plate sup, port wires D of the tube base, so that the same are respectively spread laterally out- Ward, and initially bent bending steps 26.

Securedupon the `face of said shear bloclr 33, is another transverse spreader plate 40 WhichisA provided at its .loW`e1-.e'nd with laterally spaced spreader fingers 41having downwardly and inwardly inclined lateral edges or spreader cam portions 42. Said spreader fingers 41 are so spaced laterally,

against i the said Y that, upon descent of the plunger 32, the same will engage with their spreader cam portions 42 the grid support Wires Clot the tube base, so `that the saine are respectively. spread laterally outwardly,-` andV 'initially i bent against th'e'said bending posts 24` .TU straddle said shearblocf: 33 is a transverse spreader; plate 37 provided at its lower end iin The bed-'block 16 is provided with lateral l slots 43 and 44, respectively alinedfvvith andv so fas Vto receiveV the respective pairs of spreader fingers 38 and 41 upon. descent of the plunger. 32. i

The upper sidejof. said bed block `1G isv provided with a longitudinal slideway `45,

in which is slidably mounted a horizontally Ireciprfocable plunger, 46.' VSaid plunger 46 is forwardlv movable over the anvil portion 1S. i Y

The forward end of said plunger 46is provided with a central finger 47, upon the opposite sides of which are provided rear-V Wardlv and outwardly inclined bending cams 48, which, upon forward-movement ofthe plunger 46, engage the extremities of the filament vlead-support wires B to bend the saine laterally aga-inst the bending posts 23,V to thus bring the same into the linal desired shape. y

The ,forward end said plunger 46 isr further provided, in properly: disposed position beyond the bendingcams 48, With adward movement ofthe plunger 46, engage' the grid supportwires C to complete the bending of `the saine laterally against the bending posts 24, to thus bringthe saine into plate support wires D of the tubebase, so that the same are finally bentagainst the bending steps 26 and final desired shape. v

Said plunger 46 is both retracted, and normally held in retracted position, by a compression spring 51 which is arranged on a suitable support 52 to extend between the rear end of said bed-block 16 and a depending tail-piece53 with which the rear end of said plunger 46 is provided.v

The meansfor producing properly timed operative movements of A the respective plungers 32 and 46 consistsof the following mechanism Supported on said base plate and securedrespectively against opposite sides of A said bed-block 16 are a pair of bearing and adjacent to said horizontally 'recipro-` standards 54. Journaled in and extending between the bearing members 55 of said standards 54v is an oscillatable spindle or rock-shaft 56. Fixedon said rocksh'aft 56, intermediate the 4bearing members 55, is a depending primary lever Vmember' 57, the lower free end of which terminates above cable plunger 46. Said primary lever 57 is provided in one sideface `with a substantially X-shaped countersunk seat 58. Freely pivoted on said rock-shaft 56 is a forwardly extending secondary levermember 59, which is so disposed as to extendV through said X-shaped seat 58 of said primary lever member 57 The above describedassociation of the lever members 57 and 59 is such, that por? tions of the sides of said X-shaped seat 58 provide abutments, as at 60, which engage the sides of the lever member 59, 'so that forward turning movement of said rockshaft 56, which swings rearwardly the leverv member 57, will produce an loperative downward swinging movement of said lever member 59; and, furthermore said X-shaped seat 5S provides clearance s paces61, so thatv upon rearward 'turning movement of Said rock-shaft 56, said Vlever member 57will be swung inoperative forward direction without disturbing the normal initial position of the lever member 59. SaidV lever member 59v is both retracted to and held in normal initial position by a pull-'spring r`62 whichis connected with its rearward end. The forward free end of said lever member 59 isV` provided with a knuckle 63'orother suitable projection which is entered in a receivingV an abutment lug65 which jis engaged by 'the guide blocks 27 intoV free end of the lever member 57, upon forward swinging movement ofthe latter, so that operative forward movement is transmitted to said plunger 46. If desired, said abutment lugy 65 may be provided .with anl anti-friction lroller 66 to receive the contact of said lever member 57. Said plunger 46 is further provided, tothe rear of said abutment lug 65, with a second lug 67, which is engaged by the rear face of said free end of said lever member 57 at proper times to assure initiation oftheretraction of the lever 46, so that any frictional retentionvof the bending cams of the latter after operation will be overcome.,

It is within .the scope of this invention to operate the machine by hand or by power, and to such end therock-shaftv 56 may be accordingly provided with suitable power transmission means. For ,the purposes of illustration,.the drawings show thevmachine arranged for hand operation, the power being applied to the rock-shaft 56 by a handlever 68.v 7 In the manufacture of vacuum tubes or thermionic amplifiers, a tube base T is provided, kthe same being usually made of glass, and through the body of which are passed the leadsand support wires'for the filament,l

grid and .plate elementsof the tube. The said leads and support wires are originally straight and of substantially ythe/same length as shown at X in Figure 12, and consequently before assembling the elements of the tube' inr connection with said leads and supportfwires, it is necessary to size and shape the latter to suit the characters and Y The above` describedv machine is adapted to performy relations of thev said elements.`

this. work automatically andV substantially by one operation'. To such end the machine functions as'followsz- The tube base T is presented at the front of the machine, so that the leads and support wires extend through the indented notch in the plate 25 to lay upon the anvil-'portion 18 as illustrated in Figure', the exhausting stem or tube tof the tube base T being supported by the bifurcated portion 69k Va centeringV jig or bracket 7 O'. After the tube base T Vis thus applied inoperative relation to the machine, the operator swings fon wardly the hand-lever 68, thus producing a forward oscillatory movement of the rockshaft v56 which produces a rearwardswing of the lever member 57, whereby the abut- 1nents60 engage the lever member 59 to' cause a downwardly 'swinging movementof the forward end of the latter, which is transmitted to the plunger 32,.to produce anoperative vdescending Vmovement "thereof (as shown in Figure 4), The 'descent of the plunger 32- produces theV preliminary phases of the lead and support wire shaping oper-k ations by which the filament support wire and bending elements of the latter, means for slidably supporting said plunger, a horizontally reciprocable plunger slidable on said bed-block and -movable toward said anvil portion having additional Work bending elements cooperative with said Work bending elements of the latter, a rock-shaft, means for oscillating said rock-shaft, a primary lever-member fixed on said rock-shaft and cooperative With said horizontally reciprocable plunger, a secondary lever-member loosely mounted on said rock-shaft and cooperative With said vertically reciprocable plunger, and means on said primary levermember cooperative` With said secondary lever-member whereby retractive movement of the former produces anoperative movement of the latter. t

5. In a machine of the kind describeda bed-block having an anvil portion aty its forward end provided with stationary Work cutting and. bending elements, a vertically reciprocable plunger above said anvil portion having Work cutting and bending ele- Li ments cooperative with said work'cutting and bending elements of the latter, means for slidably supporting said plunger, a horizontally reciprocable plunger slidable on said bed-block and `movable toward said anvil portion having additional Work bending elements cooperative With said Work bending elements of the latter, a rock-shaft, means for oscillating said rock-shaft, a primary` lever-member fixed on said. rock-shaft and cooperative With said horizontally reciprocable plunger, a secondary lever-member loosely mounted on said rock-shaft and cooperative with said vertically reciprocable i plunger, said primary lever-meinber having a substantially X-shaped seatto receive and embrace said secondary lever-member whereby oscillations of said rock-shaft produce operative movementsof said respective lever-meinbers to alternately move said respective plungers toward said anvil-portion and the Work supported thereon.

6. In a machine of the kind described, an anvil-portion having a kdrop-Well therein, stationary cutting elements bordering said drop-Well, and stationary bending elements; a vertically reciprocable plunger having a shear-block provided With cutting edgesto cooperate with said stationary cutting elements, and spreading and bending elements to cooperate With said stationary bending elements; a horizontally reciprocable plunger having bending cams also adapted to cooperate With said stationary bending elements of said anvil-portion; and means for producing alternate operative movements of said respective plungers toward said anvilportion and the Work supported thereon.k

7. In a machine of the kind described, an anvil-portion having a drop-Well therein, stationary cutting `eIements bordering said drop-well, and stationary bending elements; avvertically reciprocable plungerl having a shear-block provided with cutting edges to cooperate With said stationary cutting elements, and spreading and bending elements to cooperate with said stationary bending elements; a horizontally reciprocable plunger having` bending cams also adapted to cooperate' With said. stationary bending elements of'said anvil-portion; means for producing alternate operativek movements Y ofl tractivemovement of the former produces an operative movementV ofthe latter.

8. Iii a machine Toi: the kind described, an anvil-portion having" a drop-Weil therein, stationary cutting elements bordering said drop-Well, and stationary bending elements;` a vertical-ly reciprocable plunger having a `shear-blcckprovided With cutting edges to cooperate with said stationary cutting eley nients,and spreading and bending elements -to cooperate with said stationary bending elements; av horizontally reciprocable plunger having bendingcamsalso adapted to cooperate With said stationary bending elements ot' said anvil-portion; means for producing `'alternate 'operative movements oi vil-portion and the Work, supportthereon, comprising a rock-shaft, Va primary lever` fixed on said rock-shaft to lactuate said `horizontally reciprocable plunger, a secondary lever looselymounted on said rock-shaft to actuate said vertically reciprocable plunger,

and said primary lever having a substantially X-shaped seat to receive vand embrace said secondary lever as andV for the purposes described. i

9. In a machine for shaping the lead and support Wires of thermionic ainplilier tubes, an anvil-portion having a female bending means for the central filamentsupport Wire, and bending abutinents for the filament lead-support, grid support and plate support cutting elements cooperative With said stationary cutting elementsof said anvil por- Tir lsaid respective plungerstOWard said ani Ilo iso

Completing tlie ,benfdngfot 'Said Jgrid Eivind plete support Wire; end `me1ns` forV prodn`c- Y ing alternate*operativembvernetslof respective lingers toivl'rd ,Seid nnvilfportion and the Work enpported thereon.:

` lOl;` Inaiiiaoliinelfoi:shaping the lead yeind y support :Wires ofl thermionio amplifier tubes,

en `anvilportion having` a 'female bending menne 4tor the eentrel` ilnment supportwire, sind bending `zibutment for lthe filament lenclwfsnpport, gi'icleiippoi't ind plate ASiip'port Wires, 'snidfnrivil` poition'lizivinlg Istationary Cutting elements 1for trimnAf g saidyfilzliinent lead-supportend grid enpp` t K vire'sgdiver tienlly reeiproc'ible pliniger movble tovynrd seid anvil portiomsid 'pliindenlmving a male" bending element for Seidl ment Support Wire, `and spreader means for preliminarily spreading ndL laterally bending ee-i'd grid endplate 'supportl Wires. Said plunger being further provided with cutting elementecooperative with said stationery cutting 'elements of seid anvil portion; a horizontally reeiproeable plunger movable toward 'saidanvilportiom sni'd latter plunger having bending cams forbending of seid lilament lead-support` `Wires and completing the bending of seid Vgrid and plate support Wires; ineens for producing alternate operative movements` of seid reepeetive plnngers towardl leaid anvil-portion eind the lWorkSLippmt'ed thereon, compreing e rock-Shaft, mprimarylever fixed on said rock-shaft to eetnate said flioriontally reciproenble plunger7 a secondary levert loosely mounted on seidioek-'shnft to factuate vSaid vertically reeiprocable plunger, and m'eans on Seid prin'iarydevento cooperzite vvith vSeid secondary lever whereby retraetive icentral lilsif `:miniement of Vthe former Iproduces opera- M i Hi'm, ,v r3@ tive movement of the latter.

llfln n' ilialehine forfslliziping lthe lead end fledSulip'ort, griclsripport rnd plate support wires, seid 4anvil portion jh'u'ving Stationery 'cnttingI velexly'llcfsnts i for trimming Said filament lead-fsu port-end grid supportI wires ;A a veiti'eally reciproenble plunger 1movable Iltor- Mi'vird saidjfanvl'portion, sedfplunge havliiga male' bending'eletiient' for Said central l gi'lariient" support Iwire, and spreader ineens vfor l`pijeliiniiieryy "Spreading rnd litter-'elly :bending-Said grid` and fplzite ASupport uWires, eziid'pliinger*being further rovdedl vwith cutting elements Cooperative 'with seid'btutioneijyrlb tti gnelements of Said anvil Apor- ;'i a phez'ohtalyr feciprowbl plunger lmovableltoivartl sind anvil portion, 'seid latter 'plunger jhziving bentlingleamsf forjben'ding ofi Seid A lilaiifient lendnppoi't Wires weird eom'pleting the bending olf'said gridland `plete Support vvire; nieens'forlprodueing alternate"o peritive movements of Vszridre- Spective plungers n' toward' 1Seidl anvil-portion zindthewxvork supported thereon, comprising i rock-shalt, n `primary lever lixe'd on' said rook-Shaft zietnate `saidlio"rifzontzilly reefiproefable plunger', asecon-dary' lever loosely" m inted n,on Said Aroekfsheiit4 `to actuate n d vertiealljr reei'p'roezible plunger, and seid primer-yi) lever" having a ebstantially X- `slizipedseht to `receive: and en'ibrace Said seeend ary"lever,` 'es and" for the purposes' Vdeset forth above I have hereunto 'set myhiind fft'hiiey l'6th of'December, 1926;

` DANmL KQNDAKJIAN.

lliiftestimony thatl claimthe inventionV 

